KHTML

dom_misc.h

00001 /*
00002  * This file is part of the DOM implementation for KDE.
00003  *
00004  * (C) 1999 Lars Knoll (knoll@kde.org)
00005  *
00006  * This library is free software; you can redistribute it and/or
00007  * modify it under the terms of the GNU Library General Public
00008  * License as published by the Free Software Foundation; either
00009  * version 2 of the License, or (at your option) any later version.
00010  *
00011  * This library is distributed in the hope that it will be useful,
00012  * but WITHOUT ANY WARRANTY; without even the implied warranty of
00013  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00014  * Library General Public License for more details.
00015  *
00016  * You should have received a copy of the GNU Library General Public License
00017  * along with this library; see the file COPYING.LIB.  If not, write to
00018  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
00019  * Boston, MA 02110-1301, USA.
00020  *
00021  */
00022 #ifndef _DOM_RefCountImpl_h_
00023 #define _DOM_RefCountImpl_h_
00024 
00025 #include <kdelibs_export.h>
00026 
00027 namespace DOM {
00028 
00029 /*
00030  * This implements the reference counting scheme used for all internal
00031  * DOM objects.
00032  *
00033  * Other objects should overload deleteMe() to fit their needs. The default
00034  * implementation deletes the object if the ref count drops to 0.
00035  */
00036 class KHTML_EXPORT DomShared
00037 {
00038 public:
00039   DomShared() : _ref( 0 ) {}
00040   virtual ~DomShared();
00041 
00042   /* Overload this function if you want a different deletion behavior
00043    */
00044   virtual bool deleteMe();
00045 
00046   void ref() { _ref++; }
00047   void deref() { if(_ref) _ref--; if(!_ref && deleteMe()) delete this; }
00048   bool hasOneRef() const { return _ref == 1; }
00049   unsigned int refCount() const { return _ref; }
00050 
00051 protected:
00052     // the number of DOMObjects referencing this Node
00053     // An implementation object will delete itself, if it has
00054     // no DOMObject referencing it, and deleteMe() returns true.
00055     unsigned int _ref;
00056 };
00057 
00058 } // namespace
00059 
00060 #endif
KHTML

dom_misc.h

KHTML

API Reference
